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Furuno GP1670F Fish Finder and GPS

ProductDisplaySonarDepthGPSMaps
Furuno 1670F
furunogp1670f
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5.7"Standard Dual Frequency1200'Internal,
50-Channel
Basemaps

The Furuno GP1670F is a fish finder and chartplotter pretty much similar to its bigger brother, the GP1870F. Basically, the only difference between the two is the diagonal of the screen, the pixel matrix and the fact that the GP1670F lacks wireless connectivity. Even though it’s about the same price as the HELIX 7 SI GPS from Humminbird, and does not offer any advanced sonar technologies such as Side Imaging or Down Imaging, the GP1670F does come with several extra navigation features an option that other similar units do not supply. Therefore, let’s see what this GPS/fish finder can actually do.

The first aspect that must be mentioned though, is that the unit reviewed here does come with a transducer. This fishfinder / chartplotter is typically sold without one, but the links in this post will point you to the unit that does include the transducer.

Details and Specs

  • Screen: 5.7″ diagonal, 480V x 640H pixel resolution, color TFT with a 65,000 colors capacity and LED backlight
  • Sonar: Dual frequency
  • Depth Capability: 1200 feet (365 m)
  • Frequency and Coverage: 50 kHz / 45° and 200 kHz / 11°
  • Transducer: 525STID-PWD, transom type
  • Power Output: 600 Watts (RMS)
  • Power Input: 12-24 VDC: 1.0-0.5 A
  • GPS: 50-Channel, Internal; 1 Channel SBAS
  • Maps: Basemap
  • Routes, Waypoints, Trackpoints: 1000, 30000, 30000

Navigation functions

Although the array of navigation functions is not as inclusive as for the GP1870F, the Furuno GP1670F does offer several, extremely useful functions of this sort. To begin with, it incorporates a powerful 50-channel GPS system, supplying fast and accurate locks. It also uses SBAS for differential correction.

Charts can be observed in split screen, similar to the sonar, and with this function, you can basically have your maps in two levels of zoom. Speaking of charts, this unit does come with a built-in base map charts pack. However, the unit does have one SD card slot, and the maps can be upgraded with a C-MAP 4D chip, from Jeppesen. C-MAP 4D is an all-in-one charts pack, supplying standard vector charts, dynamic raster charts presentations, 3D views, satellite image overlaying and easy routing functions. There are various map views available with this unit, such as 2D, or 2D perspective, or 3D chart view, available with the basemap charts as well.

2D Perspective View on Basemap

2D Perspective View on Basemap

Like most units within this spec and price range, this Furuno fish finder offers the possibility to save waypoints and create routes for navigation. In fact, it’s internal memory can store up to 30,000 waypoints and up to 1,000 routes containing up to 50 waypoints each. On top of that, there’s a track function which allows you to record your course. Tracks are written in a breadcrumb manner, and each track can contain up to 30,000 breadcrumb points.

This unit is also AIS ready. This means that if it’s connected to an AIS transponder, it can offer navigational information of other vessels equipped with this type of transponder, within a radius of 50 nm.

Last but not least in terms of navigation functions, the Furuno GP1670F also features an anchor alarm and the Man Over Board (MOB) function, which can be very useful on the water.

Sonar functions

As opposed to different units within this price range, from various manufacturers, this unit comes with a pretty basic sonar. However, due to its 50/200 kHz transducer, it can reach depths up to 1200 ft. (365 m). This makes it a great fish finder for offshore use.

As we’ve mentioned above, the unit presented here does come with a transducer. To be more specific, the transducer that you will receive with the box is the 600W, 525STID-PWD. This

525STID-PWD Transducer

525STID-PWD Transducer

transducer comes with 30 ft. (9 m) of cable, with a 10-pin connector. It has a transom mount and incorporated a water temperature probe. It’s a dual frequency transducer, operating with two conical beams. The beam used with the 50 kHz frequency, intended for higher depths, which has an angle of 45°. This sonar beam is reliable up to the 1200 ft. depth. The 200 kHz frequency operates with a narrower beam, of 11°, offering sharper returns. This sonar beam is reliable at depths up to 700 ft (213 m).

Various other sonar and sonar-related functions are Accu-Fish, Bottom Lock, Bottom Discrimination and Temperature Graph. Accu-Fish is a function that resembles the Selective Fish ID in Humminbird units. It’s a sonar function that assigns fish icons to sonar returns interpreted as fish. Therefore, if you’re not used to sonar readings, or you don’t feel comfortable using the classic sonar view, which displays fish as arches, you can use this feature. Bottom Lock, as terminology suggests, keeps focus on the water column near the bottom, offering a zoom view of the bottom. Conversely, the Bottom Discrimination function supplies data regarding the bottom hardness, and its structure, by 4 types – sand, mud, rock or gravel. Last but not least, the Temperature Graph keeps track of the water temperature of the upper water substrate. It’s actually great to find currents, or keep an eye on the water temperature variation for catching certain fish.

Other functions

An important function regarding the Furuno GP1670F is the NMEA 2000 CANbus, which diversifies its connectivity, making it easier to integrate into the boat’s grid. It has an IP56 proof rating, meaning that it’s dust-protected and can tolerate incidental water exposure, but not immersion. The LCD and AR glass sheets are bonded together, to provide a fogging-free operation. The screen is LED backlit, being easy to read even in direct sunlight, and even when wearing polarized sunglasses.

The unit has an SD card slot for charts upgrade, or for waypoints, routes, and screenshots.

The Pros

In case you’ve missed any of the pluses regarding this unit, the following summary should put them all into view:

  • Easy to install and use;
  • Straightforward navigation through menus;
  • Bright color display, LED backlit;
  • Mount included;
  • Customizable analog and digital displays;
  • NMEA 2000 compatible;
  • One SD card slot for upgrades and data transfer;
  • Dual frequency sonar, with up to 1200 depth capabilities;
  • Additional sonar features, such as Bottom Lock, Bottom Discrimination and Accu-Fish;
  • Supports Temperature Graph;
  • Accurate and fast 50-channel GPS, and 1SBAS;
  • Large internal memory storage, being able to hold 30,000 waypoints and 1,000 routes, much more than other units within this price range;
  • C-MAP 4D by Jeppesen compatible;
  • AIS ready;
  • Full range of alarms.

The Cons

There are several minuses regarding this unit, which wouldn’t be fair to leave out. So, here they are:

  • No side view or down view technology compatibility;
  • No C-Weather function, this being available only with the Furuno GP1870F;
  • No sonar recording function.

Bottom Line

The Furuno GP1670F offers quite an excellent package of navigation functions, with several pluses over other units within this price/capability range. However, it only offers basic sonar, even though a fairly capable sonar, depth-wise. Therefore, if you’re looking for more sonar features, this unit might not be what you really want. On the other hand, if you want a super reliable navigation tool, this unit is definitely on to put on your shopping list.

One Comment

  1. very fair assessment of the gp1670f
    I personally require it for navigation only so the final bottom line
    is good to read.

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